Which of the following governs the action of a buffer solution?
Correct answer: C. Le Chatelier's principle
- A. Leveling effect
- B. Solvent effect
- C. Le Chatelier's principle
- D. None of these
Explanation
The action of a buffer is an excellent example of Le Chatelier's principle. When a strong acid or base is added, the buffer's equilibrium shifts to consume the added H⁺ or OH⁻, thereby resisting a large change in pH.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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